Automatic sampling equipment for realizing adsorption of target compound based on solid-phase microextraction

Abstract

The utility model relates to the technical field of water quality analysis, and particularly discloses automatic sampling equipment for realizing target compound adsorption based on solid-phase microextraction, which comprises a main body, a water storage container, a separator, a drainage pump, a power supply, a circuit board, a control module and a plurality of sampling units, the power output end of the driver is connected with the clamp and can drive the clamp to rotate. A plurality of probes are mounted in each clamp, and the surfaces of the probes are coated with solid-phase micro-extraction coatings; the water storage container is detachably connected below the main body, and a water storage cavity is formed in the water storage container; the separator is arranged in the water storage cavity and divides the water storage cavity into sampling areas matched with the sampling units in number; and the clamp extends into the sampling area. According to the utility model, the automatic sampling work of the carried coating steel wire at different points to be detected can be realized, the sampling units do not influence each other, and the sampling device has the advantages of high working efficiency and high sampling accuracy.

Description

Technical Field

[0001] The utility model belongs to the technical field of water quality analysis, and specifically relates to an automated sampling device for achieving target compound adsorption based on solid phase microextraction. Background Art

[0002] Solid phase microextraction is a solvent-free, easy-to-operate, green and environmentally friendly sample pretreatment technology that combines sampling, extraction, separation and enrichment in one step. There are two ways to use solid phase microextraction technology to analyze water samples in the environment:

[0003] Method 1: After collecting water samples on site, bring them back to the laboratory, put them in a 10mL or 20mL glass sample bottle and cover them with a lid; install the solid phase microextraction probe in the sleeve, and use the push rod at the tail to protect the probe from damage during the piercing of the bottle cap; at a certain temperature, the coating of the solid phase microextraction probe is exposed to water or headspace extraction, and an oscillator is used to oscillate the sample bottle to speed up the sampling rate; after a period of time, the coating is retracted into the sleeve, the sleeve is pulled out from the sample bottle, and subsequent instrumental analysis is performed.

[0004] Method 2: Use a portable electric drill to clamp the solid phase microextraction probe. The fixture uses the portable electric drill as the power source to rotate the turntable, thereby driving the solid phase microextraction probe to rotate, thereby accelerating the sampling rate; the solid phase microextraction probe is exposed to the water body for a period of time for sampling, and then the probe enriched with pollutants is collected, stored and brought back to the laboratory for analysis. Using this method, there is no need to bring the water sample back to the laboratory. You only need to seal the extracted probe and bring it back to the laboratory for subsequent analysis, which effectively avoids the loss and contamination of samples during transportation and greatly reduces manpower and material costs.

[0005] Both of the above methods use stainless steel wire as a carrier for the adsorbed coating. The stainless steel material is small in diameter, fragile and easy to bend, and has strict requirements on the inner diameter of the matching casing (stainless steel outer diameter ≤ coating inner diameter < casing inner diameter), which makes the customized casing process complicated and expensive, greatly increasing the experimental cost. At the same time, it is also necessary to ensure that the other end of the stainless steel wire (the uncoated end) can be inserted into the casing and is not easy to slip off. This clamping method has high requirements on the operating skills of the experimenter.

[0006] Method 1, like other traditional sample pretreatment methods, cannot achieve in-situ sampling. Water samples need to be collected and sent back to the laboratory for processing. This process may lead to sample contamination and loss. In addition, the water sample has a short storage time and needs to be processed in time. This method has great limitations when the sample volume is large or the sampling point is far from the laboratory.

[0007] Method 2 uses a portable electric drill as the power source for rotating the solid phase microextraction probe, which can achieve in-situ sampling in the field and only bring back a very small probe for laboratory analysis. However, this method has some shortcomings:

[0008] (1) Only surface water that can be accessed can be collected and analyzed: Since the device needs to be handheld, the experimenter needs to be at the sampling point and the depth of immersion in the water is very shallow, generally not more than half a meter. If the weather is bad, the hydrological conditions are poor, and it is difficult to reach the target sampling point (such as the center of the lake, turbulent rivers, etc.), this method cannot achieve solid phase microextraction sampling at the target point. Moreover, this method can only collect surface water and cannot sample different water depths.

[0009] (2) High requirements for operators: Loading the solid phase microextraction probe with a hand drill requires additional equipment and installation steps, which has a certain degree of operational complexity. Since the hand drill is heavy, it is difficult to operate and labor-intensive to hold the hand and perform sampling for 15-30 minutes without moving.

[0010] (3) The sampling rate is uncontrollable: Since the electric drill has fixed gears and speeds, it cannot be adjusted according to experimental needs, which imposes certain limitations on pollutant extraction. Utility Model Content

[0011] The purpose of the utility model is to provide an automated sampling device for achieving adsorption of target compounds based on solid phase microextraction, so as to solve the defects mentioned in the above background technology.

[0012] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0013] An automated sampling device for achieving target compound adsorption based on solid phase microextraction, comprising a main body, a water storage container, a separator, a drainage pump, a power supply, a circuit board, a control module and a plurality of sampling units, wherein the sampling unit, the drainage pump, the power supply and the circuit board are all arranged inside the main body, and each of the sampling units comprises a water inlet pump, a driver and a fixture, wherein the power output end of the driver is connected to the fixture and can drive the fixture to rotate; a plurality of probes are installed in each of the fixtures, and the surfaces of the probes are coated with a solid phase microextraction coating;

[0014] The water storage container is detachably connected to the lower part of the main body, and a water storage cavity is formed inside the water storage container; the divider is arranged inside the water storage cavity, and divides the water storage cavity into sampling areas matching the number of sampling units; the clamp extends into the sampling area;

[0015] A water inlet hole and a drainage hole are provided on the outer wall of the water storage container, and a water inlet main pipe, a drainage main pipe, a plurality of water inlet branches and a plurality of drainage branch pipes are provided inside the water storage cavity, and the number of the water inlet branches and the number of the drainage branch pipes correspond to the number of the sampling areas one by one; each of the water inlet branches is connected to the water inlet pump, one end of the water inlet main pipe is connected to the water inlet hole, and the other end of the water inlet main pipe is respectively connected to the plurality of water inlet branches, and each of the water inlet branches extends to the bottom of each of the sampling areas; the drainage main pipe is provided with the drainage pump, one end of the drainage main pipe is connected to the drainage hole, and the other end of the drainage main pipe is respectively connected to the plurality of drainage branch pipes, and each of the drainage branch pipes extends to the bottom of each of the sampling areas;

[0016] The power supply is electrically connected to the circuit board, and the control module is electrically connected to the water inlet pump, the drainage pump and the driver respectively through the circuit board.

[0017] As a preferred embodiment of the utility model, a first mounting plate, a second mounting plate and a third mounting plate are sequentially spaced from top to bottom inside the main body, and the first mounting plate, the second mounting plate and the third mounting plate are supported and fixed by support columns; the circuit board is mounted on the first mounting plate; the driver is mounted on the second mounting plate; the drainage pump and multiple water inlet pumps are both mounted on the upper side of the third mounting plate, the drainage pump is arranged in the middle position of the third mounting plate, and the multiple water inlet pumps are evenly arranged on the outside of the drainage pump along the circumferential direction; the clamp is rotatably connected to the lower side of the third mounting plate.

[0018] As a preferred solution of the utility model, the driver is a rotary motor, and the rotating shaft of the rotary motor passes through the second mounting plate and is fixedly connected to the clamp through a connecting shaft.

[0019] As a preferred solution of the utility model, the fixture is provided with a plurality of stations for installing the probes, the plurality of stations are evenly arranged along the circumferential direction, a magnet is provided in the station, and the probe is magnetically connected to the magnet.

[0020] As a preferred solution of the utility model, a waterproof gasket is provided between the main body and the water storage container.

[0021] As a preferred embodiment of the utility model, it also includes a cylindrical liquid level sensor, a fixing groove for placing the liquid level sensor is provided at the middle position of the separator, a first liquid level detection line and a second liquid level detection line are provided on the liquid level sensor, the first liquid level detection line and the second liquid level detection line are arranged in a circumferential direction, the first liquid level detection line is arranged at the bottom of the water storage chamber, and the second liquid level detection line is arranged above the first liquid level detection line; the control module is electrically connected to the liquid level sensor through the circuit board.

[0022] As a preferred solution of the utility model, the upper end of the main body is provided with a connecting portion that can be connected to an expansion compartment of the underwater robot.

[0023] Compared with the prior art, the automated sampling device for achieving target compound adsorption based on solid phase microextraction provided by the utility model has the following beneficial effects:

[0024] (1) The utility model can realize automatic sampling at different test points by using coated steel wire, which changes the traditional experimental method of water sampling, transportation and storage, sample pretreatment, and instrument analysis and measurement, making the sampling process convenient and fast, and can quickly extract and analyze pollutants in different water level measurement points. The operation is simpler and does not consume too much manpower, thereby greatly improving work efficiency.

[0025] (2) In the present invention, when the probe is exposed to the water to be tested, the fixture is rotated by the driver. At this time, the relative angular velocity of the water flow is accelerated, and the thickness of the diffusion layer around the solid phase microextraction coating is reduced. This can not only shorten the time for the target analyte to reach the coating from the aqueous phase, thereby achieving the purpose of increasing the sampling rate, but also enable the probe coating to fully contact the water sample, thereby increasing the adsorption efficiency and enrichment uniformity of the target compound.

[0026] (3) Since the main body of the utility model is provided with a plurality of sampling units, and the water storage chamber is divided into a plurality of sampling areas corresponding to the sampling units by a separator, the sampling units do not affect each other during sampling, thereby improving the sampling accuracy of a single water body measurement point; at the same time, since a plurality of probes are installed in each fixture, the extraction accuracy of a single water body measurement point can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0028] Figure 1 It is a schematic diagram of the structure of an automated sampling device for achieving adsorption of target compounds based on solid phase microextraction provided by an embodiment of the utility model;

[0029] Figure 2It is a schematic diagram of the internal structure of a water storage container;

[0030] Figure 3 It is a schematic diagram of the structure of the automated sampling device for achieving target compound adsorption based on solid phase microextraction provided by an embodiment of the utility model, in a state where the main body and the water storage container are hidden;

[0031] Figure 4 It is a structural schematic diagram of an automated sampling device for realizing adsorption of target compounds based on solid phase microextraction provided by an embodiment of the utility model in a state where a main body, a water storage container, a water inlet pump, a water inlet main pipe, a water drainage main pipe, a water inlet branch pipe and a water drainage branch pipe are hidden;

[0032] Figure 5 It is a structural diagram of the water inlet pump, water inlet main pipe, drainage main pipe, water inlet branch pipe and drainage branch pipe.

[0033] Markings in the figure:

[0034] 1. Main body; 2. Water storage container; 2a. Drain hole; 2b. Water inlet hole; 3. Divider; 4. Drain pump; 5. Power supply; 6. Circuit board; 7. Sampling unit; 71. Water inlet pump; 72. Driver; 73. Clamp; 73a. Work station; 74. Connecting shaft; 8. Sampling area; 9. Water inlet main pipe; 10. Drainage main pipe; 11. Water inlet branch pipe; 12. Drainage branch pipe; 13. First mounting plate; 14. Second mounting plate; 15. Third mounting plate; 16. Support column; 17. Waterproof gasket; 18. Liquid level sensor; 19. Fixing groove; 20. Connecting part. DETAILED DESCRIPTION

[0035] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. It should be understood that the terms "first", "second", etc. are used in the present utility model to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present utility model, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information.

[0037] See also Figures 1 to 5 The preferred embodiment of the utility model provides an automated sampling device for adsorbing target compounds based on solid phase microextraction, which includes a main body 1, a water storage container 2, a separator 3, a drainage pump 4, a power supply 5, a circuit board 6, a control module and a plurality of sampling units 7. The sampling unit 7, the drainage pump 4, the power supply 5 and the circuit board 6 are all arranged inside the main body 1. Each of the sampling units 7 includes a water inlet pump 71, a driver 72 and a fixture 73. The power output end of the driver 72 is connected to the fixture 73 and can drive the fixture 73 to rotate. Multiple probes (not shown in the figure) are installed in each fixture 73, and the surface of the probe is coated with a solid phase microextraction coating. In this embodiment, the number of sampling units 7 is preferably 5, and they are evenly arranged in the circumferential direction; the number of probes installed in each fixture 73 is preferably 3, and the diameter of the probe is preferably 0.288 mm.

[0038] The water storage container 2 is detachably connected to the lower part of the main body 1, and a water storage cavity is formed inside the water storage container 2; the divider 3 is arranged inside the water storage cavity, and divides the water storage cavity into sampling areas 8 matching the number of the sampling units 7; the clamp 73 extends into the sampling area 8; a water inlet hole 2b and a drainage hole 2a are arranged on the outer wall of the water storage container 2, and a water inlet main pipe 9, a drainage main pipe 10, a plurality of water inlet branch pipes 11 and a plurality of water inlet and drainage branch pipes 12 are arranged inside the water storage cavity, and the number of the water inlet branch pipes 11 and the number of the water inlet and drainage branch pipes 12 are both the same as the number of the sampling units 7. The number of sample areas 8 corresponds one to one; each of the water inlet branches 11 is connected to the water inlet pump 71, one end of the water inlet main pipe 9 is connected to the water inlet hole 2b, and the other end of the water inlet main pipe 9 is respectively connected to multiple water inlet branches 11, and each of the water inlet branches 11 extends to the bottom of each sampling area 8; the drainage main pipe 10 is provided with the drainage pump 4, one end of the drainage main pipe 10 is connected to the drainage hole 2a, and the other end of the drainage main pipe 10 is respectively connected to multiple water inlet and outlet branch pipes 12, and each of the water inlet and outlet branch pipes 12 extends to the bottom of each sampling area 8.

[0039] The power source 5 is electrically connected to the circuit board 6 , and the control module is electrically connected to the water inlet pump 71 , the drainage pump 4 , and the driver 72 respectively through the circuit board 6 .

[0040] It should be noted that, in this embodiment, the first mounting plate 13, the second mounting plate 14 and the third mounting plate 15 are sequentially arranged from top to bottom inside the main body 1, and the first mounting plate 13, the second mounting plate 14 and the third mounting plate 15 are supported and fixed by the support column 16; the circuit board 6 is mounted on the first mounting plate 13; the driver 72 is mounted on the second mounting plate 14; the drainage pump 4 and the plurality of water inlet pumps 71 are both mounted on the upper side of the third mounting plate 15, the drainage pump 4 is arranged at the middle position of the third mounting plate 15, and the plurality of water inlet pumps 71 are evenly arranged on the outer side of the drainage pump 4 along the circumferential direction; the clamp 73 is rotatably connected to the lower side of the third mounting plate 15. The driver 72 is preferably a rotary motor, and the rotating shaft of the rotary motor passes through the second mounting plate 14 and is fixedly connected to the clamp 73 through the connecting shaft 74.

[0041] According to the automated sampling device for achieving target compound adsorption based on solid phase microextraction of the utility model, during operation, when it is necessary to sample a water sample at a certain test point, the control module turns off the drainage pump 4 and starts the water inlet pump 71 of one of the sampling units 7, so that the water sample at the test point passes through the water inlet main pipe 9 and the water inlet branch pipe 11 in turn into the sampling area 8 corresponding to the sampling unit 7, so that the probe in the fixture 73 is exposed to the water sample to be tested; then, the control module starts the driver 72 of the sampling unit 7, and the driver 72 drives the fixture 73 to rotate, so as to achieve extraction and enrichment of the target compound, and complete the extraction of the water sample to be tested at the test point. When it is necessary to sample the water sample to be tested at another test point, the control module starts the drainage pump 4 and closes the water inlet pump 71 in all sampling units 7, so that the residual water sample in each sampling area 8 is discharged to the outside of the water storage container 2 through the water inlet and outlet branch pipes 12 and the drainage main pipe 10 in turn; then, the above steps are repeated, that is, the control module introduces the water sample to be tested at the test point into the corresponding sampling area 8 through another sampling unit 7 until the water sample sampling work at the test point is completed. After completing the sampling work of the water samples to be tested at all test points, the operator removes the device from the water body, separates the water storage container 2 from the main body 1, and then removes the probe in the clamp 73, saves the probe and analyzes and tests it.

[0042] It can be seen that the utility model can realize the automatic sampling work of the coated steel wire at different points to be tested, which changes the traditional experimental method of water sampling, transportation and storage, sample pretreatment, instrument analysis and measurement, making the sampling process convenient and fast, and can quickly extract and analyze pollutants in different water level measurement points. The operation is simpler and does not consume too much manpower, thereby greatly improving the work efficiency; secondly, when the probe is exposed to the water body to be tested, the clamp 73 is rotated by the driver 72. At this time, the relative angular velocity of the water flow is accelerated, and the thickness of the diffusion layer around the solid phase microextraction coating is reduced, which can not only shorten the target The time for the analyte to reach the coating from the aqueous phase is shortened, thereby achieving the purpose of increasing the sampling rate, and also enabling the probe coating to fully contact the water sample, thereby increasing the adsorption efficiency and enrichment uniformity of the target compound; in addition, since a plurality of sampling units 7 are provided in the main body 1 of the utility model, and the water storage chamber is divided into a plurality of sampling areas 8 corresponding to the sampling units 7 by the separator 3, the sampling units 7 do not affect each other during sampling, which can improve the sampling accuracy of a single water body measurement point; at the same time, since a plurality of probes are installed in each clamp 73, the extraction accuracy of a single water body measurement point can be improved.

[0043] Exemplarily, the fixture 73 is provided with a plurality of stations 73a for installing the probe, and the plurality of stations 73a are evenly arranged in the circumferential direction. A magnet (preferably a strong magnet) is provided in the station 73a, and the probe is magnetically connected to the magnet. During installation, the operator places the probe inside the station 73a with tweezers, and fixes the probe on the magnet by adsorption. After shaking the fixture 73 to confirm that the probe is firmly adsorbed, the fixture 73 is connected to the driver 72. It can be seen that when installing the probe, the characteristics of the magnet can be fully utilized, and the traditional fixed low-matching method of solid phase microextraction probe and customized sleeve can be abandoned, which reduces the installation difficulty of the experimenter. At the same time, the probe used will no longer be limited by size, and there is no need to purchase expensive customized sleeves.

[0044] Exemplarily, a waterproof gasket 17 is provided between the main body 1 and the water storage container 2. Such a design can achieve a good waterproof effect, preventing external water samples from entering the interior of the main body 1 from the connection between the main body 1 and the water storage container 2, thereby damaging the pump body and the driver 72.

[0045] Exemplarily, the utility model of the automated sampling equipment for achieving target compound adsorption based on solid phase microextraction also includes a cylindrical liquid level sensor 18, a fixed groove 19 for placing the liquid level sensor 18 is provided at the middle position of the separator 3, and a first liquid level detection line and a second liquid level detection line are provided on the liquid level sensor 18, the first liquid level detection line and the second liquid level detection line are arranged in a circumferential direction, the first liquid level detection line is arranged at the bottom of the water storage chamber, and the second liquid level detection line is arranged above the first liquid level detection line; the control module is electrically connected to the liquid level sensor 18 through the circuit board 6. It should be noted that the setting of the liquid level sensor 18 can monitor the water level in the sampling area 8. Specifically, before the water sample to be tested enters the sampling area 8 through the water inlet main pipe 9 and the water inlet branch pipe 11, if the control module detects that there is liquid remaining at the first liquid level detection line, the control module will turn off the water inlet pump 71; and the second liquid level detection line is the highest water level of the water sample to be tested entering the sampling area 8. If the control module detects that there is liquid at the second liquid level detection line, the control module will turn off the water inlet pump 71 and stop the water inlet operation.

[0046] Illustratively, the upper end of the main body 1 is provided with a connecting portion 20 that can be connected to the expansion compartment of the underwater robot. Therefore, the utility model can use the underwater robot as a carrier, and the operator does not need to reach the sampling point or use a hand drill to collect samples. The operator only needs to control it on the shore or on the boat to achieve the sampling of water points to be tested at different depths and positions, making the sampling process convenient and fast and reducing labor intensity.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. An automated sampling device for achieving target compound adsorption based on solid phase microextraction, characterized in that: It includes a main body, a water storage container, a separator, a drainage pump, a power supply, a circuit board, a control module and a plurality of sampling units, wherein the sampling unit, the drainage pump, the power supply and the circuit board are all arranged inside the main body, and each sampling unit includes a water inlet pump, a driver and a fixture, wherein the power output end of the driver is connected to the fixture and can drive the fixture to rotate; each of the fixtures is equipped with a plurality of probes, and the surface of the probes is coated with a solid phase microextraction coating; The water storage container is detachably connected to the lower part of the main body, and a water storage cavity is formed inside the water storage container; the divider is arranged inside the water storage cavity, and divides the water storage cavity into sampling areas matching the number of the sampling units; the clamp extends into the sampling area; A water inlet hole and a drainage hole are provided on the outer wall of the water storage container, and a water inlet main pipe, a drainage main pipe, a plurality of water inlet branches and a plurality of drainage branch pipes are provided inside the water storage cavity, and the number of the water inlet branches and the number of the drainage branch pipes correspond to the number of the sampling areas one by one; each of the water inlet branches is connected to the water inlet pump, one end of the water inlet main pipe is connected to the water inlet hole, and the other end of the water inlet main pipe is respectively connected to the plurality of water inlet branches, and each of the water inlet branches extends to the bottom of each of the sampling areas; the drainage main pipe is provided with the drainage pump, one end of the drainage main pipe is connected to the drainage hole, and the other end of the drainage main pipe is respectively connected to the plurality of drainage branch pipes, and each of the drainage branch pipes extends to the bottom of each of the sampling areas; The power supply is electrically connected to the circuit board, and the control module is electrically connected to the water inlet pump, the drainage pump and the driver respectively through the circuit board.

2. The automated sampling device for achieving target compound adsorption based on solid phase microextraction according to claim 1, characterized in that: A first mounting plate, a second mounting plate and a third mounting plate are sequentially arranged in sequence from top to bottom inside the main body, and the first mounting plate, the second mounting plate and the third mounting plate are supported and fixed by support columns; the circuit board is mounted on the first mounting plate; the driver is mounted on the second mounting plate; the drainage pump and multiple water inlet pumps are both mounted on the upper side of the third mounting plate, the drainage pump is arranged in the middle position of the third mounting plate, and the multiple water inlet pumps are evenly arranged on the outside of the drainage pump in the circumferential direction; the clamp is rotatably connected to the lower side of the third mounting plate.

3. The automated sampling device for achieving target compound adsorption based on solid phase microextraction according to claim 2, characterized in that: The driver is a rotary motor, and the rotating shaft of the rotary motor passes through the second mounting plate and is fixedly connected to the clamp via a connecting shaft.

4. The automated sampling device for achieving target compound adsorption based on solid phase microextraction according to claim 3, characterized in that: The fixture is provided with a plurality of workstations for installing the probes, and the plurality of workstations are evenly arranged along a circumferential direction. Magnets are arranged in the workstations, and the probes are magnetically connected to the magnets.

5. The automated sampling device for achieving target compound adsorption based on solid phase microextraction according to claim 1, characterized in that: A waterproof gasket is provided between the main body and the water storage container.

6. The automated sampling device for achieving target compound adsorption based on solid phase microextraction according to claim 1, characterized in that: It also includes a cylindrical liquid level sensor, a fixing groove for placing the liquid level sensor is provided at the middle position of the separator, a first liquid level detection line and a second liquid level detection line are provided on the liquid level sensor, the first liquid level detection line and the second liquid level detection line are arranged along the circumferential direction, the first liquid level detection line is arranged at the bottom of the water storage cavity, and the second liquid level detection line is arranged above the first liquid level detection line; the control module is electrically connected to the liquid level sensor through the circuit board.

7. The automated sampling device for achieving target compound adsorption based on solid phase microextraction according to any one of claims 1 to 6, characterized in that: The upper end of the main body is provided with a connecting portion which can be connected to the expansion compartment of the underwater robot.

Images